i like them all too, but Galadriel could obliterate the other two in a fight. Besides that though, Galadriel is just awesome. She defended her realm from 3 attacks that were all within days of each other.

i see in the movies this:
galadriel a freaky voiced strange not pretty ruler of woodland forest
arwen an emo crying baby
eowyn a fighter for what she loves and reasonable human, not some sap or neverending creep
the books are different but there is a picture of galadriel from the movie